Additional thoughts on TRANSITIONAL
marka at isc.org
Wed Dec 9 00:40:17 CET 2009
In message <20091208182555.GA9616 at shinkuro.com>, Andrew Sullivan writes:
> On Mon, Dec 07, 2009 at 07:45:50PM +0000, Shawn Steele wrote:
> > Right now IE lower-cases everything regardless of the DNS record,
> > however presumably they could exist. Additionally, assuming
> > "case-preserving" really means that everyone registers lower case
> > forms, then we have "case-insensitive" DNS, which IS fairly
> > interesting. It isn't hard to find links to sites using an initial
> > upper case or camel cased forms.
> "Case-preserving" might mean that, if it is registered in the DNS with
> mixed case, then a match in the DNS for a differently-cased query will
> result in an answer being returned that has the regstered case.
> Alternatively, it might mean that you get the case you ask for.
> That's the way bind 9.4.2 works:
> $ dig -v
> DiG 9.4.2
> $ dig +noall +answer microsoft.com
> microsoft.com. 2363 IN A 18.104.22.168
> microsoft.com. 2363 IN A 22.214.171.124
> $ dig +noall +answer Microsoft.com
> Microsoft.com. 2361 IN A 126.96.36.199
> Microsoft.com. 2361 IN A 188.8.131.52
> Unfortunately, it isn't clear which of these meanings it should be.
And it is a 1 additional functions call to change named to do return the
cases from the zone. It could be argued that this is require for 103
> Andrew Sullivan
> ajs at shinkuro.com
> Shinkuro, Inc.
> Idna-update mailing list
> Idna-update at alvestrand.no
Mark Andrews, ISC
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PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
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